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Investments - Schedule of Investments, Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 687,813	$ 578,669
Gross Unrealized Gains	9,124	2,414
Gross Unrealized Losses	(666)	(3,395)
Estimated Fair Value	696,271	577,688
Corporate
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	262,302	230,917
Gross Unrealized Gains	3,982	1,226
Gross Unrealized Losses	(116)	(954)
Estimated Fair Value	266,168	231,189
U.S. Treasury
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	181,077	146,211
Gross Unrealized Gains	701	424
Gross Unrealized Losses	(161)	(760)
Estimated Fair Value	181,617	145,875
States and municipalities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	29,182	31,543
Gross Unrealized Gains	967	134
Gross Unrealized Losses	(3)	(92)
Estimated Fair Value	30,146	31,585
Foreign
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	33,000	21,022
Gross Unrealized Gains	54	59
Gross Unrealized Losses	(62)	(24)
Estimated Fair Value	32,992	21,057
Asset-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	31,899	23,625
Gross Unrealized Gains	394	175
Gross Unrealized Losses	(42)	(120)
Estimated Fair Value	32,251	23,680
Mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	150,353	125,351
Gross Unrealized Gains	3,026	396
Gross Unrealized Losses	(282)	(1,445)
Estimated Fair Value	$ 153,097	$ 124,302

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